warehouse construction method statement

Method Statement for Warehouse Construction

1. Purpose

This Method Statement outlines the sequence, responsibilities, materials, and safety procedures for the construction of a steel-framed warehouse including civil, structural, and finishing works. It ensures that all activities comply with project specifications, local codes, and safety standards.

2. Scope of Work

This document covers all construction stages, including:

• Site preparation and setting out

• Excavation and foundation works

• Concrete and reinforcement works

• Structural steel erection (PEB or conventional)

• Roofing and cladding

• Masonry, doors, and finishes

• MEP installations (if applicable)

• External works and final inspection

3. References

• Project drawings and specifications

• Saudi Building Code (SBC)

• ASTM / ACI / BS standards

• Manufacturer’s data sheets

• Safety standards: OSHA, NEBOSH, and local regulations

4. Responsibilities

5. Materials and Equipment

Materials

• Ready-mix concrete (25–35 MPa)

• Reinforcing steel (Grade 60)

• Structural steel sections (ASTM A36/A572)

• Roofing and wall cladding panels (Galvalume / sandwich type)

• Anchor bolts and fasteners

• Masonry blocks and cementitious materials

Equipment

• Excavator, backhoe, compactor

• Crane (for steel erection)

• Welding and cutting tools

• Concrete mixers and vibrators

• Surveying instruments (theodolite, total station)

6. Construction Procedure

6.1 Site Preparation

• Conduct a topographic survey and set out gridlines.

• Clear debris, vegetation, and level the ground.

• Construct temporary site offices, storage, and safety signage.

6.2 Excavation and Foundation

• Excavate foundations to the required depth and width.

• Compact the bottom layer and pour lean concrete blinding (100 mm thick).

• Fix reinforcement as per approved shop drawings.

• Cast foundations and columns using approved concrete mix.

• Conduct slump and cube tests for quality control.

6.3 Anchor Bolts and Base Plates

• Set anchor bolts accurately using templates and coordinate with steel shop drawings.

• Verify bolt alignment and elevation before concrete pour.

• After curing, check base plates for alignment before column erection.

6.4 Structural Steel Erection

• Erect steel columns using cranes under supervision.

• Install rafters, bracings, and purlins sequentially.

• Perform bolting and torque checks as per manufacturer’s guidelines.

• Conduct welding works following WPS (Welding Procedure Specification).

• Inspect all connections visually and dimensionally before proceeding.

6.5 Roof and Wall Cladding

• Install insulation (if required).

• Fix roof sheets, ensuring proper overlaps and sealant application.

• Install wall cladding with fasteners, trims, and flashings.

• Check alignment and appearance of all panels.

6.6 Floor Slab Works

• Prepare the subgrade and compact to 95% MDD.

• Lay vapor barrier and reinforcement mesh.

• Place concrete and level with laser screed.

• Apply surface hardener and finish as per specifications.

• Cure the floor for at least 7 days.

6.7 Masonry and Finishes

• Construct block walls and plaster as required.

• Install steel or aluminum doors and windows.

• Paint internal and external surfaces with approved paints.

6.8 MEP Works (Optional Section)

• Lay underground sleeves and conduits before concrete works.

• Install lighting, sockets, and fire alarm systems.

• Fix HVAC ducts and diffusers as per design.

• Connect plumbing and drainage to main systems.

6.9 External Works

• Construct access roads and walkways with proper compaction.

• Install stormwater drainage, septic tanks, and manholes.

• Landscape and fence the perimeter.

7. Quality Control

• All materials must have supplier test certificates.

• Site inspections to be documented in ITP (Inspection and Test Plan).

• Maintain records of concrete tests, steel alignment, and bolt torque reports.

• Any non-conformance shall be rectified and recorded.

8. Health, Safety & Environment (HSE)

• Conduct safety induction for all personnel.

• Provide PPE (helmets, gloves, vests, safety shoes).

• Ensure scaffolds and lifting equipment are certified.

• Fire extinguishers and first aid kits available on-site.

• Daily toolbox talks and safety inspections.

9. Work Sequence Summary

1. Site preparation

2. Foundation works

3. Anchor bolts and pedestals

4. Steel erection

5. Roofing and cladding

6. Floor casting

7. MEP and finishes

8. External works

9. Final inspection and handover

10. Documentation and Handover

• As-built drawings

• Test certificates (concrete, welding, bolt torque)

• HSE compliance reports

• Final completion report and client approval

11. Conclusion

This method statement provides a systematic approach to constructing a high-quality, safe, and efficient warehouse structure. All activities shall comply with approved design drawings, project specifications, and applicable standards to achieve timely delivery and client satisfaction.